139
When the thousands place of P02.00 is 0 (i.e. motor 1 is selected as the asynchronous motor), the
meanings of the above motor parameters are shown in Fig.6-12.
R
1
jX
11
R
2
jX
21
I
1
I
2
I
0
X
m
U
1
1-S
S
R
2
Fig. 6-12 Equivalent circuit diagram for asynchronous motor in steady state
The R
1
, X
11
, R
2
, X
21
, X
m
, I
o
in Fig.6-12 respectively indicate the stator resistance, stator leakage inductive
reactance, rotator resistance, rotator leakage inductive reactance, mutual inductive reactance and
no-load current. Function code P03.07 is the sum of leakage inductive reactance of the stator and rotator.
If the parameters of the asynchronous motor are known, please write the actual values into
P03.18~P03.22. P03.22 is the no-load current of asynchronous motor. You can directly enter the no-load
current value.
If the motor parameter auto-tuning is conducted, the set values of P03.18~P03.22 will be refreshed after
the normal completion of the auto-tuning.
After changing the power of the asynchronous motor (P03.12), the drive will set the parameters of
P03.14~P03.21 to be the default parameters of the motor.(The rated voltage of motor 1 (P03.13) needs to
be set according to the nameplate by the user).
When the thousands place of P02.00 is 1 (i.e. motor 2 is selected as the synchronous motor), the
meanings of the above motor parameters are as below: the definition of the stator resistance of motor 2
(P03.18) is the same as that of the asynchronous motor; the leakage inductance or the direct axis
inductance of motor 2 (P03.19) indicates the direct axis inductance of the synchronous motor; the rotator
resistance or back-EMF constant of motor 2 (P03.20) indicates the back-EMF constant of the
synchronous motor (at this time, it displays an integer, indicating the back-EMF voltage for 1000 turns.
For example, P03.08=1000 indicates that the back-EMF at 1000 turns of rated rotating speed of the
motor is 1000V); the mutual inductance or the q-axis inductance of motor 2 (P03.21) indicates the q-axis
inductance value; the meanings of other parameters are the same as that of the asynchronous motor.
To provide effective overload protection for motors of different models, it is necessary to adjust the
allowable maximum output current of the drive, as shown in Fig.6-13.
Overload protection coefficient of motor 2 20.0~110.0% (100.0%)P03.23
No-load current (I
0
) of motor 2 0.1~999.9 A(depending on model) P03.22
Mutual inductance or q-axis inductance of motor 2 0000.0~2000.0 (depending on model) P03.21
Rotator resistance or back-EMF constant of motor 2
00.000~65.000 (depending on model) P03.20
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